System description
User manual 57106_hdb_en_13 14 / 94
Bus node Bus interface and power module of the bus node are integrated in one hous-
ing. The bus interface is used for connection to a superior bus system.
Both bus interface and the electronics of the connected expansion modules
are supplied with power via the power module.
There is another connection on the power module for the 24 V DC power sup-
ply of the connected expansion modules.
Bus cover
By installing up to 64 expansion modules
on the bus node, they will be electrically
connected, i.e.:
they are incorporated in the back-
plane bus,
the electronic modules are supplied
with power,
each expansion module is connected
to the 24 V DC power supply.
Each bus node has a cover to protect the
contacts.
Remove the cover on the bus node
before installing Cube20 modules.
To protect the contacts, mount the
bus cover on the outermost module.
The bus cover is also available as acces-
sory (see chapter 12.1 "Accessories").
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